Alloy steel pipe welding burr polishing structure and polishing method

Abstract

The application discloses an alloy steel pipe welding burr polishing structure and a polishing method, relates to the field of grinding or polishing devices, machine tools or processes, and comprises a support frame, a U-shaped placing frame fixed on the support frame and a pipeline, wherein the pipeline can rotate on the U-shaped placing frame; one end of a bottom plate is also slidably provided with a motor, the output end of the motor is fixedly provided with a rotating shaft, the rotating shaft is fixedly provided with a rotating disc, the rotating disc is provided with two racks, the two racks are provided with a gear meshing with the racks, the gear is provided with an adjusting shaft, the side wall of the rotating shaft is rotatably provided with a penetrating shaft rotating with the adjusting shaft, the outer side of the welding part of the pipeline is provided with a polishing ring, and the pipeline and the polishing ring are relatively rubbed when the pipeline rotates, so that the circumferential polishing of the welding part of the pipeline is realized. Through the setting of the polishing ring, the axial polishing of the welding part can be realized, and the burr polishing effect of the welding part is better.

Description

Technical Field

[0001] The present invention relates to a device, a machine tool or a process field for grinding or polishing, and in particular to a structure and a method for grinding burrs of alloy steel pipe welding. Background Art

[0002] Welded steel pipe refers to a steel pipe that is formed by bending steel plates or strips into a circular shape and then welding them to form a weld seam on the surface. Welding is typically done using techniques such as arc welding, high-frequency or low-frequency resistance welding, electric welding, and furnace welding.

[0003] In industry, steel pipes are generally used to transport gas or liquid, such as natural gas, oil or hot steam. When welding steel pipes, burrs will appear on the welding parts. On the one hand, the burrs will affect the installation of the pipeline during installation. In particular, when painting or rust-proofing the welding parts, the welding parts need to be polished smooth before painting and rust-proofing to avoid uneven painting caused by burrs, which may cause corrosion of the pipeline.

[0004] The current technology generally uses a grinding disc to grind the weld. The grinding disc is generally a cylindrical structure. The grinding disc is rotated by a motor, while the pipe remains in a stationary state. The welding joint is welded and polished by the grinding disc, and the grinding position is inconvenient to control.

[0005] Patent publication number CN108637821A discloses a rotatable grinding device for removing burrs from natural gas welded steel pipes. Although the device can rotate and grind the steel pipe 360 ​​degrees, its grinding disc is still a disc-shaped structure. During grinding, if the position of the pipe shakes, the grinding position will move, making it inconvenient to grind the pipe. Moreover, the device can only grind the pipe opening and cannot grind the welding part. Summary of the Invention

[0006] The purpose of the present invention is to provide a structure and method for grinding burrs of alloy steel pipe welding to solve the problems raised in the above background technology.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: an alloy steel pipe welding burr grinding structure, comprising a plurality of support frames and a bottom plate, wherein the bottom plate connects the plurality of support frames into a whole,

[0008] A U-shaped placement frame is fixedly installed on the support frame, and a pipe is placed inside the U-shaped placement frame;

[0009] A bearing is installed on the outside of the pipe. When the pipe is placed on the U-shaped rack, the bearing contacts the rack and the pipe can rotate on the rack.

[0010] One end of the base plate is also slidingly installed with a motor, the output end of the motor is fixedly installed with a rotating shaft, the rotating shaft is fixedly installed with a rotating disc, and the rotating shaft can rotate with the rotating disc; two racks are installed on the rotating disc,

[0011] A gear meshing with the racks is installed between the two racks, the rotating center of the gear is fixedly installed with an adjusting shaft, the adjusting shaft extends into the interior of the rotating shaft and is coaxially arranged with the rotating shaft, a through shaft is rotatably installed on the side wall of the rotating shaft, the through shaft is radially arranged and connected with the adjusting shaft through a bevel gear;

[0012] The through shaft is rotated, the gear can be rotated with the through shaft, the gear moves outward with the rack, and eccentrically clamps the inner side of the pipeline, the output shaft of the motor is rotated, the rotating disc and the pipeline are rotated;

[0013] A polishing ring is installed on the outer side of the welding part of the pipeline, and the pipeline is relatively rubbed with the polishing ring when the pipeline is rotated, so that the circumferential polishing of the welding part of the pipeline is realized.

[0014] Preferably, two clamping rings are installed on the outer side of the bearing, a supporting shaft is fixedly installed on the clamping ring, and the two clamping rings are bolted together to form a ring structure;

[0015] A vertical placement groove is formed in the inner side of the U-shaped placement rack, when the pipeline is located in the interior of the U-shaped placement rack, the supporting shaft is located in the placement groove, and the pipeline is supported.

[0016] Preferably, the polishing ring comprises a plurality of fixed rings, the plurality of fixed rings are connected by bolts to form a ring structure, a polishing sleeve is bolted on the inner side of the fixed ring, and the polishing sleeve is in contact with the pipeline to polish the pipeline;

[0017] A supporting strip is fixedly welded on the fixed ring, the bottoms of the supporting strips are connected together through a rotating shaft, the supporting strip can be opened outward around the rotating shaft, so that the plurality of fixed rings and the polishing sleeve are opened outward and installed on the outer side of the pipeline;

[0018] A limiting block is fixedly installed on the bottom of one of the supporting strips, the limiting block limits the supporting strip to avoid the fixed ring rotating with the pipeline, and the pipeline can be circumferentially polished.

[0019] Preferably, the fixed ring can also slide horizontally on the base plate;

[0020] A polishing motor is also fixedly installed on the base plate, a driving shaft is fixedly installed on the output end of the polishing motor, and an arc-shaped guide groove is formed in the driving shaft;

[0021] The bottom of one of the support bars is fixedly provided with a limiting ring, and the limiting ring is located in the guide groove; when the driving shaft rotates, the support bar can slide horizontally under the action of the guide groove, so that the limiting ring and the polishing sleeve slide horizontally, and the pipeline can be polished in the axial direction.

[0022] Preferably, the pipeline welding portion comprises an inner ring, an outer ring and a plurality of connecting columns, the inner ring is welded on the inner side of the connecting portion of the two pipeline sections, and the outer ring is welded on the outer side of the connecting portion of the two pipeline sections; the connecting columns are located between the inner ring and the outer ring, and the two ends of the connecting columns are welded with the two pipeline sections respectively;

[0023] The inner ring and the outer ring are also filled with alloy powder;

[0024] The welding portion is heated by the heating coil to melt the alloy powder and bond the alloy powder together, and the connecting columns can improve the strength of the connecting portion as the framework of the welding portion.

[0025] Preferably, the outer ring is provided with a ventilation hole at the upper end of the outer ring.

[0026] Preferably, the outer ring is composed of a plurality of arc-shaped segments, and the arc-shaped segments are fitted together when the outer ring is welded.

[0027] Preferably, the heating coil is a ring-shaped structure composed of a plurality of conductive rings spliced together, one end of the conductive ring is welded with a connecting pipe, the other end of the adjacent conductive ring is inserted into the connecting pipe and connected together by a bolt;

[0028] The heating coil can be directly installed on the outer side of the welding portion of the two pipelines, and can heat the welding portion when electrified.

[0029] Preferably, a placing groove is formed in one half of the U-shaped placing frame, and a sliding groove is formed in the inner side of the other half of the U-shaped placing frame, and a plurality of sliding blocks capable of sliding horizontally are installed in the sliding groove.

[0030] A horizontal groove is formed in the side wall of the sliding groove, and a protrusion matched with the horizontal groove is fixedly installed on the rear side of the sliding block, so that the sliding block can slide horizontally in the sliding groove.

[0031] A gap is left between the sliding block and the side wall and the bottom of the sliding groove, so that the support shaft can be placed in the sliding groove and can slide horizontally in the sliding groove.

[0032] A method for polishing the welding burr of an alloy steel pipe adopts the alloy steel pipe welding burr polishing structure described above: when polishing the pipeline, first, place the two pipeline sections on the U-shaped placing frame, and connect the pipeline sections.

[0033] Then extend the rotating disk into the pipe, rotate the adjusting shaft, extend the two racks outward, clamp the pipe eccentrically, open the fixing ring and the grinding sleeve, place the pipe inside the grinding sleeve, and connect the fixing rings together with bolts;

[0034] When the motor rotates, it can rotate the pipe and grind the welding part of the pipe in circumferential direction;

[0035] The grinding motor drives the driving shaft to rotate, causing the fixed ring and the grinding sleeve to slide horizontally, thereby performing axial grinding on the pipe, that is, grinding in the horizontal direction.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] The present invention can achieve eccentric clamping of the pipeline by arranging the rotating disk and the rack. When the pipeline is clamped, the rack has a better clamping effect on the pipeline as it rotates with the pipeline in the rotation direction.

[0038] When releasing the clamping of the pipe, it is only necessary to rotate the rotating disk in the direction to release the clamping of the pipe, which makes it convenient to add and remove the pipe.

[0039] Moreover, after adjusting the position of the rack, when clamping the pipe, the rack maintained in the pushed-out state can be pushed directly into the pipe. When the rotating disk rotates with the pipe, the pipe can be clamped automatically, which makes it more convenient to clamp the pipe.

[0040] Moreover, by setting a grinding ring, axial grinding of the weld can be achieved, and the burr grinding effect on the weld is better. Even if the pipe moves in the axial direction, the weld can still be ground because the grinding ring wraps the weld. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 This is the overall structural diagram of the grinding device of the present invention;

[0042] Figure 2 A cross-sectional view of the rotating disk, rack and pipeline of the present invention;

[0043] Figure 3 It is a structural diagram of the rotating disk and rack of the present invention;

[0044] Figure 4 This is a structural diagram of the grinding ring of the present invention;

[0045] Figure 5 This is the overall structural diagram of the grinding ring, inner ring, outer ring, and heating coil of the present invention;

[0046] Figure 6 This is a structural diagram of the inner ring, outer ring and connecting column of the present invention;

[0047] Figure 7 The sectional view of the heating coil of the present application;

[0048] Figure 8 The structural view of the heating coil and the connecting pipe of the present application;

[0049] Figure 9 The sectional view of the inner ring, the outer ring, the connecting column and the heating coil of the present application;

[0050] Figure 10 The sectional view of the inner ring, the outer ring, the connecting column and the heating coil of the present application;

[0051] Figure 11 The structural view of the sliding groove, the support frame and the U-shaped placing frame of the present application.

[0052] In the figure: 1, support frame; 2, motor; 3, rotating disc; 4, U-shaped placing frame; 5, placing groove; 6, pipe; 7, clamping ring; 8, bearing; 9, support shaft; 10, fixed ring; 101, polishing sleeve; 11, guide groove; 12, driving shaft; 13, support strip; 14, rack; 15, gear; 16, rotating shaft; 17, through shaft; 18, connecting column; 19, inner ring; 20, outer ring; 21, heating coil; 22, connecting pipe; 23, alloy powder; 24, sliding block; 25, horizontal groove; 27, sliding groove. DETAILED DESCRIPTION

[0053] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0054] Please refer to the drawings shown in the figure, the embodiment discloses a kind of alloy steel pipe welding burr polishing structure, including four support frames 1 and bottom plate, four support frames 1 are welded together with bottom plate, and bottom plate connects multiple support frames 1 into a whole. As shown in Figure 1 .

[0055] Support frame 1 is fixedly installed with U-shaped placing frame 4, the opening of U-shaped placing frame 4 is upward, and pipe 6 is placed in the inner side of U-shaped placing frame 4, which can be directly placed in the interior of U-shaped placing frame 4 from the opening.

[0056] The outer side of pipe 6 is installed with bearing 8, and the inner diameter of the inner ring of bearing 8 is just the same as the outer diameter of pipe 6, which can be directly installed in the inner ring of bearing 8. Pipe 6 can rotate in the inner ring of bearing 8. As shown in Figure 1 .

[0057] When the pipe 6 is placed on the U-shaped placing rack 4, the outer ring of the bearing 8 is in contact with the U-shaped placing rack 4, and the pipe 6 can rotate on the U-shaped placing rack 4.

[0058] The bottom plate is also slidably connected with the motor 2 at one end. The bottom plate is provided with a sliding groove at one end, and the motor 2 is fixedly connected with a sliding seat at the bottom. The bottom of the sliding seat is located in the sliding groove and can slide horizontally in the sliding groove.

[0059] The output end of the motor 2 is fixedly connected with a rotating shaft 16, and the rotating shaft 16 is fixedly connected with the rotating disc 3. The rotating shaft 16 can rotate with the rotating disc 3. The rotating disc 3 is a cuboid structure.

[0060] Two racks 14 are installed on the rotating disc 3, as shown in Figures 1-3 , the rack 14 is an L-shaped structure and is slidably connected in the rotating disc 3.

[0061] A gear 15 meshing with the rack 14 is installed on the rotating disc 3 between the two racks 14. The rotating center of the gear 15 is fixedly connected with an adjusting shaft, as shown in Figure 2 and Figure 3 . The adjusting shaft extends into the interior of the rotating shaft 16 and is coaxially arranged with the rotating shaft 16. A through shaft 17 is rotatably connected to the side wall of the rotating shaft 16, and the through shaft 17 is radially arranged and extends to the outside of the rotating shaft 16. An internal hexagonal recess is formed in the through shaft 17. The end of the through shaft 17 located in the interior of the rotating shaft 16 is connected with the adjusting shaft through a bevel gear. When the through shaft 17 rotates, the adjusting shaft rotates, the adjusting shaft drives the gear 15 to rotate, and the gear 15 drives the rack 14 to slide on the rotating disc 3 when rotating, so as to be clamped with the inner side wall of the pipe 6. As shown in Figure 2 .

[0062] When the rack 14 clamps the pipe 6, the pipe 6 is eccentrically clamped, as shown in Figure 2 . As shown in Figure 2 , the rotating center of the pipe 6 is the axis of the rotating shaft 16, and the rack 14 does not penetrate the rotating center of the pipe 6 when clamping the pipe 6, but is located on the upper side and the lower side of the rotating center of the pipe 6 and is eccentrically clamped with the inner side wall of the pipe 6 (i.e. the clamping part does not pass through the axis of the pipe 6). When the rotating disc 3 rotates with the pipe 6, as shown by the solid arrow in Figure 2 , the direction of rotation is the side of the small space of the rack 14, and the extrusion between the rotating disc 3 and the side wall of the pipe 6 can be formed as the rotating disc 3 rotates, as shown in Figure 2 . As the rotating disc 3 rotates, the clamping between the rack 14 and the pipe 6 becomes tighter, the clamping force becomes larger, and the clamping of the pipe 6 becomes more stable.

[0063] Reverse rotation rotating disc 3, rotating disc 3 with rack 14 reverse rotation, as Figure 2 The dashed arrow, rack 14 to the space to the side of the reverse rotation, will be directly with the inner wall of the pipe 6 separation, the realization of the quick release action between the pipe 6, do not need to rotate through the shaft 17, the disassembly of the pipe 6 is very convenient.

[0064] In addition, after adjusting the length of the rack 14, do not need to adjust the rack 14, in clamping other inner diameter of the pipe 6, keep the rack 14 exit state, directly inserted into the pipe 6, with the rotating disc 3 rotation, will automatically clamp the inner wall of the pipe 6, so as to realize the quick clamping work of the pipe 6.

[0065] Clamping pipe 6, the output shaft of the motor 2 rotation, with rotating disc 3 and pipe 6 rotation, to provide power for the pipe 6.

[0066] The pipe 6 welding outside the installation of polishing ring, pipe 6 rotation and polishing ring between the relative friction, polishing ring can be on the pipe 6 welding of the circumference direction of polishing.

[0067] Polishing ring includes two fixed ring 10, as Figure 4 The two ends of the fixed ring 10 fixed installation of convex strip, convex strip on the bolt hole, bolt hole in the installation of bolt, two fixed ring 10 through the bolt connection into a ring structure.

[0068] The inner side of the fixed ring 10 through the bolt installation of polishing sleeve 101, polishing sleeve 101 because of the use of bolt and fixed ring 10 installed together, so, can be more convenient to take down the polishing sleeve 101 from the fixed ring 10, realize the replacement of polishing sleeve 101. Polishing sleeve 101 of the outer side and the inner ring diameter of the fixed ring 10 is the same, while the inner ring diameter of the polishing sleeve 101 can be selected according to the outer diameter of the pipe 6.

[0069] Polishing sleeve 101 and pipe 6 contact, in the pipe 6 by the motor 2 with rotation, the burr of the pipe 6 welding part polishing. And polishing sleeve 101 wrapped in the outer side of the pipe 6, with the pipe 6 welding part of the circumference of the full contact, in the pipe 6 rotation, the polishing effect of the pipe 6 is better.

[0070] The fixed ring 10 fixed welding has support strip 13, the bottom of the support strip 13 through the shaft connection together. As Figure 4 The support strip 13 can be opened outward around the shaft, so that the plurality of fixed ring 10 and the polishing sleeve 101 open outward, in the open state, can be directly placed in the polishing sleeve 101 of the inner side of the pipe 6 welding, complete the polishing of the pipe 6.

[0071] The bottom of one of the support bars 13 is fixedly provided with a limiting block, which is directly fixed to the bottom plate by bolts.

[0072] The limiting block limits the support bar 13, avoids the fixed ring 10 and the polishing sleeve 101 from rotating together with the pipeline 6, and enables the pipeline 6 and the polishing sleeve 101 to relatively rotate, thereby achieving the circumferential polishing of the pipeline 6.

[0073] In further embodiments, in order to better achieve the installation of the pipeline 6 and make the pipeline 6 placed in the U-shaped placing rack 4 more stable, the outer side of the bearing 8 is provided with two clamping rings 7, which are fixed together by bolts to form a ring structure, as shown in Figure 1 The clamping ring 7 is fixedly provided with a support shaft 9. The extension line of the support shaft 9 passes through the center of the clamping ring 7 and is in a horizontal state.

[0074] The inner side of the U-shaped placing rack 4 is provided with a placing groove 5 arranged vertically, as shown in Figure 1 When the pipeline 6 is located in the U-shaped placing rack 4, the support shaft 9 is located in the placing groove 5 and supports the pipeline 6, which is convenient for placing the pipeline 6 and keeps the extension line of the support shaft 9 passing through the center of the clamping ring 7 and in a horizontal state in the placing groove 5. When different pipelines 6 are placed, the height of the rotation axis of the pipeline can be kept consistent, and the rotation axis of the rotating shaft 16 of the motor 2 is also kept consistent with the axis of the pipeline 6, so that the position of the pipeline does not need to be adjusted when the pipeline 6 is clamped, and the clamping of the pipeline 6 is very convenient.

[0075] In further embodiments, the fixed ring 10 can also be arranged to be horizontally slidable on the bottom plate. For example, the bottom plate is also fixedly provided with a polishing motor, the output end of the polishing motor is fixedly provided with a driving shaft 12, the driving shaft 12 is rotatably arranged on the bottom plate, and the polishing motor can rotate with the driving shaft 12. The driving shaft 12 is provided with a plurality of guide grooves 11 in an arc structure, the guide grooves 11 are V-shaped structures, and the plurality of guide grooves 11 are distributed on the outer side of the driving shaft 12 and are in communication with each other.

[0076] The bottom of one of the support bars 13 is fixedly provided with a limiting block, which is directly fixed to the bottom plate by bolts. Figure 1 When the driving shaft 12 rotates, the support bar 13 can slide horizontally back and forth under the action of the guide groove 11, thereby horizontally sliding with the fixed ring 10 and the polishing sleeve 101, and the pipeline 6 can be axially polished.

[0077] When the motor 2 rotates with the pipe 6 around the axis, the polishing sleeve 101 can polish the welding position of the pipe 6 in the circumferential direction, and the driving shaft 12 with the fixing ring 10 and the polishing sleeve 101 slides in the horizontal direction to polish the welding position of the pipe 6 in the axial direction.

[0078] When the pipe 6 is polished, the pipe 6 rotates and the polishing sleeve 101 moves, so that the pipe 6 and the polishing sleeve 101 are in mutual motion friction. Compared with the rotation of the pipe 6 or the horizontal movement of the polishing sleeve 101 (one component moves in the relative motion mode), the pipe 6 and the polishing sleeve 101 are in mutual motion friction, the friction coefficient is smaller, the pipe 6 is more convenient to polish, and the polishing in the circumferential direction and the axial direction is realized at the same time, the polishing effect is better, and the polishing is more uniform.

[0079] In order to better match the polishing of the application, improve the polishing effect and ensure the firmness of the welding position, the welding method and welding device of the pipe 6 are particularly pointed out in the application.

[0080] The welding position of the pipe 6 includes an inner ring 19, an outer ring 20 and a connecting column 18, as shown in Figure 5 The inner ring 19 is welded on the inner side of the connecting part of the two pipes 6, and the outer ring 20 is welded on the outer side of the connecting part of the two pipes 6, as shown in Figure 6 The connecting column 18 is located between the inner ring 19 and the outer ring 20, and the two ends of the connecting column 18 are welded with the two pipes 6 respectively. The connecting column 18 is the skeleton of the welding position.

[0081] The inner ring 19 and the outer ring 20 are also filled with alloy powder 23; the heating coil 21 is also placed at the position where the two pipes 6 need to be welded.

[0082] The heating coil 21 is used to heat the welding position by eddy current, so that the alloy powder 23 is melted and bonded together, and the melted alloy powder 23 can also be solidified with the connecting column 18, the inner ring 19 and the outer ring 20 after cooling. The connecting column 18 as the skeleton of the welding position can improve the strength of the connecting part.

[0083] And the outer ring 20 has a welding position with the pipe 6 during welding, and the welding position of the outer ring 20 and the pipe 6 needs to be polished during polishing. During polishing, the fixing ring 10 and the polishing sleeve 101 are directly installed on the outer side of the welding position, and the motor 2 and the polishing motor can be used to polish the welding position.

[0084] Ventilation holes are formed on the outer ring 20, and the ventilation holes are located at the upper end of the outer ring 20. When the alloy powder is melted, the ventilation holes can discharge the gas generated by the melting of the alloy powder 23 to the outside, so as to ensure the quality of the welding position.

[0085] When the connecting position of the two pipes 6 is welded, the inner ring 19 is welded first, and then the inner ring 19 is welded to the two pipes 6. Then, the connecting columns 18 are welded one by one, and the two ends of the connecting columns 18 are connected to the two pipes 6, respectively. Then, the powder is filled, and the powder is pressed to the inner ring 19, and the powder wraps the connecting columns 18. Finally, the outer ring 20 is welded, the alloy powder 23 and the connecting columns 18 are wrapped between the inner ring 19 and the outer ring 20, and the welding position is heated and melted.

[0086] In the embodiment, the heating coil 21 is a ring structure which is spliced by a plurality of conductive rings. As shown in Figure 5 One end of the conductive ring is welded with the connecting pipe 22, and the other end of the adjacent conductive ring is inserted into the connecting pipe 22 and connected by the bolt, as shown in Figures 7-8 .

[0087] The heating coil 21 can be directly installed outside the welding position of the two pipes 6, and can heat the welding position when the power is turned on. When the heating coil 21 is installed, the conductive rings are spliced with each other, and the welding position of the pipe 6 is located inside the heating coil 21, that is, one end of the conductive ring is inserted into the connecting pipe 22 and connected by the bolt, so as to wrap the welding position. After the power is turned on, the heating coil 21 can generate a high-frequency magnetic field to heat and melt the alloy powder 23 of the welding position, as shown in Figures 9-10 .

[0088] After the welding is completed, the bolt is loosened, and the conductive ring is disassembled, so that the heating coil 21 is separated from the pipe 6.

[0089] In further embodiments, in order to facilitate the placement of the alloy powder 23, and to better exhaust gas during welding, the outer ring 20 is formed by a plurality of arc-shaped segments that are welded together. In theory, the more arc-shaped segments, the better. In this embodiment, there are eight arc-shaped segments. After the inner ring 19 and the connecting column 18 are welded, the arc-shaped segment at the bottom can be welded first, and the arc-shaped segment is welded to the two pipe sections 6. Then the alloy powder 23 is placed in the space between the arc-shaped segment and the inner ring 19, and the alloy powder is compressed by the steel pipe. Then the arc-shaped segment can be continuously welded, and the alloy powder 23 can be continuously placed. When welding the last arc-shaped segment, the arc-shaped segment is located directly above, so the alloy powder 23 can be placed first, and then the last arc-shaped segment is welded. The plurality of arc-shaped segments form the outer ring 20, and the plurality of arc-shaped segments are welded together. When the welding site is heated and welded by the heating coil, the gas generated by the melting of the powder can be exhausted between the arc-shaped segments, and the exhaust effect is better. Because the viscosity of the metal is relatively large when it melts, it will not flow out between the arc-shaped segments.

[0090] In this embodiment, during welding, the motor 2 can first drive the pipe section 6 to rotate. Because the two pipe sections 6 are connected by the inner ring 19, the outer ring 20, and the connecting column 18, when the motor drives the pipe section 6 to rotate, both pipe sections can rotate.

[0091] After the pipe section 6 is rotated, the heating coil 21 is powered to heat the welding site of the pipe section 6. When the coil 21 is used for heating, the powder, the inner ring, and the outer ring are in close contact, and the volume of the powder is relatively small, so its specific surface value is relatively large, and it will melt first when heated. The connecting column 18, the inner ring 19, and the outer ring 20 melt relatively slowly, but will turn red. After the pipe section 6 is rotated, under the action of inertia, a very small force can keep the pipe section 6 in a rotating state, so even after the connecting column 18, the inner ring 19, and the outer ring 20 turn red, both pipe sections 6 will rotate together.

[0092] During rotation, the powder has already melted, and during rotation, the fluid that has melted is subjected to centrifugal force, and the crystal arrangement between the fluids is more ordered, improving the strength of the welding site. Moreover, because the distance between molecules increases during melting, part of the flowing liquid will stick to the gap between the arc-shaped segments during gas exhaust, connecting the arc-shaped segments together.

[0093] Then the power supply to the motor 2 can be stopped, and both pipe sections 6 can be rotated to a stopped state under the action of inertia, and then cooled. After cooling, the welding site can be polished.

[0094] In the embodiment, the U-shaped placing rack 4 is provided with a vertical placing groove 5, and one pipe is placed in the placing groove 5, and the pipe 6 can only move up and down on the U-shaped placing rack 4 to be taken out.

[0095] The other half of the U-shaped placing rack 4 is provided with a sliding groove 27 on the inner side, and a plurality of sliding blocks 24 capable of horizontally sliding are installed in the sliding groove 27, as shown in Figure 11 .

[0096] The side wall of the sliding groove 27 is provided with a horizontal groove 25, and the rear side of the sliding block 24 is fixedly installed with a protrusion matched with the horizontal groove 25, the protrusion is matched with the horizontal groove 25, and the protrusion can horizontally slide in the horizontal groove 25, so that the sliding block 24 can horizontally slide in the sliding groove 27, as shown in Figure 11 .

[0097] The sliding block 24 is left with a gap between the side wall and the bottom of the sliding groove 27, so that the support shaft 9 can be placed in the sliding groove 27 and can horizontally slide in the sliding groove 27, when another pipe 6 is placed, the sliding block 24 is slid to open the gap between the sliding blocks 24, and the support shaft 9 of the other pipe 6 is placed at the bottom of the sliding groove 27, when the inner ring 19 is welded, the other pipe 6 can be horizontally slid to make the pipe 6 contact with the front pipe 6, and the inner ring, the connecting column 18 and the outer ring 20 are welded.

[0098] When welding, the sliding block 24 is located directly above the support shaft 9, and the upper part of the support shaft 9 is limited, so that the support shaft 9 is placed more stably.

[0099] After polishing, the sliding block 24 is slid to remove the sliding block 24 above the support shaft 9, and is in a state of no shielding, so that the treated pipe 6 can be directly taken up, and the installation and taking down of the pipe 6 are more convenient.

[0100] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A structure for grinding burrs on alloy steel pipe welding, characterized by: It comprises a plurality of support frames (1) and a bottom plate, wherein the bottom plate connects the plurality of support frames (1) into a whole. A U-shaped placement frame (4) is fixedly mounted on the support frame (1), and a pipe (6) is placed inside the U-shaped placement frame (4); A bearing (8) is installed on the outer side of the pipe (6); when the pipe (6) is placed on the U-shaped placement frame (4), the bearing (8) contacts the U-shaped placement frame (4), and the pipe (6) can rotate on the U-shaped placement frame (4); A motor (2) is also slidably mounted on one end of the base plate. A rotating shaft (16) is fixedly mounted on the output end of the motor (2). A rotating disk (3) is fixedly mounted on the rotating shaft (16). The rotating shaft (16) can rotate the rotating disk (3). Two racks (14) are mounted on the rotating disk (3). A gear (15) meshing with the racks (14) is installed between the two racks (14); an adjusting shaft is fixedly installed at the rotation center of the gear (15); the adjusting shaft extends into the interior of the rotating shaft (16) and is coaxially arranged with the rotating shaft (16); a through shaft (17) is rotatably installed on the side wall of the rotating shaft (16); the through shaft (17) is radially arranged and connected to the adjusting shaft via a bevel gear; The through shaft (17) is rotated, and the through shaft (17) can rotate the gear (15), and the gear (15) moves the rack (14) outward and eccentrically clamps the inner side of the pipe (6). The output shaft of the motor (2) rotates, and rotates the rotating disk (3) and the pipe (6); A grinding ring is installed on the outside of the welding part of the pipe (6), and relative friction occurs between the pipe (6) and the grinding ring when the pipe (6) rotates, thereby achieving circumferential grinding of the welding part of the pipe (6); The grinding ring comprises a plurality of fixing rings (10), the plurality of fixing rings (10) being connected to form an annular structure by bolts, a grinding sleeve (101) being mounted on the inner side of the fixing ring (10) by bolts, the grinding sleeve (101) being in contact with the pipe (6) to grind the pipe (6); The feature is that the fixing ring (10) can also slide horizontally on the bottom plate; A grinding motor is also fixedly mounted on the bottom plate, and a driving shaft (12) is fixedly mounted on the output end of the grinding motor, wherein a guide groove (11) with an arc structure is provided on the driving shaft (12); A limiting ring is fixedly installed at the bottom of one of the support bars (13), and the limiting ring is located in the guide groove (11). When the driving shaft (12) rotates, the support bar (13) can slide horizontally under the action of the guide groove (11), thereby sliding the fixing ring (10) and the grinding sleeve (101) horizontally, and can perform axial grinding on the pipe (6).

2. The alloy steel pipe welding burr grinding structure according to claim 1, characterized in that: Two clamping rings (7) are installed on the outer side of the bearing (8), a support shaft (9) is fixedly installed on the clamping ring (7), and the two clamping rings (7) are installed together by bolts to form an annular structure; A vertical placement groove (5) is provided on the inner side of the U-shaped placement rack (4); when the pipeline (6) is located inside the U-shaped placement rack (4), the support shaft (9) is located in the placement groove (5) to support the pipeline (6).

3. The alloy steel pipe welding burr grinding structure according to claim 1, characterized in that: A support bar (13) is fixedly welded to the fixing ring (10), and the bottoms of the support bars (13) are connected together by a rotating shaft. The support bar (13) can be opened outward around the rotating shaft, so that the multiple fixing rings (10) and the grinding sleeve (101) are opened outward and installed on the outside of the pipe (6); A limiting block is fixedly installed at the bottom of one of the support bars (13), and the limiting block limits the support bar (13) to prevent the fixing ring (10) from rotating along with the pipe (6), thereby enabling circumferential grinding of the pipe (6).

4. The alloy steel pipe welding burr grinding structure according to claim 1, characterized in that: The pipe (6) welding portion comprises an inner ring (19), an outer ring (20) and a plurality of connecting columns (18), wherein the inner ring (19) is welded to the inner side of the connecting portion of the two pipe sections (6), and the outer ring (20) is welded to the outer side of the connecting portion of the two pipe sections (6); the connecting column (18) is located between the inner ring (19) and the outer ring (20), and both ends of the connecting column (18) are respectively welded to the two pipes (6); Alloy powder (23) is also filled between the inner ring (19) and the outer ring (20); The welding point is eddy-current heated by a heating coil (21), so that the alloy powder (23) melts and bonds together. The connecting column (18) serves as a skeleton of the welding point, thereby improving the strength of the connection point.

5. The alloy steel pipe welding burr grinding structure according to claim 4, characterized in that: The outer ring (20) is provided with an air vent, which is located at the upper end of the outer ring (20).

6. The alloy steel pipe welding burr grinding structure according to claim 5, characterized in that: The outer ring (20) is composed of a plurality of arc segments, and when the outer ring (20) is welded, the plurality of arc segments are fitted together.

7. The alloy steel pipe welding burr grinding structure according to claim 5, characterized in that: The heating coil (21) is an annular structure composed of multiple conductive rings spliced ​​together, one end of the conductive ring is welded with a connecting pipe (22), and the other end of the adjacent conductive ring is inserted into the connecting pipe (22) and connected together by bolts; The heating coil (21) can be directly installed on the outside of the welding point of the two pipes (6) and can heat the welding point when powered on.

8. The alloy steel pipe welding burr grinding structure according to claim 7, characterized in that: A placement groove (5) is provided on one half of the U-shaped placement rack (4), and a slide groove (27) is provided on the inner side of the other half of the U-shaped placement rack (4), wherein a plurality of sliders (24) capable of sliding horizontally are installed in the slide groove (27); A horizontal groove (25) is provided on the side wall of the slide groove (27), and a protrusion matching the horizontal groove (25) is fixedly installed on the rear side of the slider (24), so that the slider (24) can slide horizontally in the slide groove (27); A gap is left between the slider (24) and the side wall and bottom of the slide groove (27), so that the support shaft (9) can be placed in the slide groove (27) and can slide horizontally in the slide groove (27).

9. A method for grinding burrs on alloy steel pipe welds, using the alloy steel pipe weld burr grinding structure according to any one of claims 1 to 3, characterized in that: When grinding the pipe (6), first place two sections of the pipe (6) on the U-shaped placement rack (4) and weld the pipe (6); Then, the rotating disk (3) is inserted into the pipe (6), and the adjusting shaft is rotated to extend the two racks (14) outward to eccentrically clamp the pipe (6). The fixing ring (10) and the grinding sleeve (101) are opened, and the pipe (6) is placed inside the grinding sleeve (101). The fixing ring (10) is connected together with bolts; When the motor (2) rotates, it can drive the pipe (6) to rotate, thereby performing circumferential grinding on the welding part of the pipe (6); The grinding motor drives the driving shaft (12) to rotate, so that the fixing ring (10) and the grinding sleeve (101) slide horizontally, and the pipeline (6) can be axially ground, that is, ground in the horizontal direction.

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